when using babel, pg-native is always required (and fails if not present)

I’m not sure if this is a Babel or a node-postgres bug, steps to reproduce:

export PATH=$PATH:/tmp/iojs-v3.0.0-linux-x64/bin/:./node_modules/.bin
mkdir t
cd t
npm install babel pg

# create a t.js file with this ES6 content:
import * as pg from "pg";
console.log(pg);

# now execute: 
babel t.js > t-es5.js
node t-es5.js 

Error: Cannot find module 'pg-native'
    at Function.Module._resolveFilename (module.js:338:15)
    at Function.Module._load (module.js:280:25)
    at Module.require (module.js:364:17)
    at require (module.js:380:17)
    at Object.<anonymous> (/tmp/o/node_modules/pg/lib/native/index.js:1:76)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Module.require (module.js:364:17)

Babel generates the following code in t-es5.js:

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj["default"] = obj; return newObj; } }

var _pg = require("pg");

var pg = _interopRequireWildcard(_pg);

console.log(pg);

The exception is happening in the _interopRequireWildcard(_pg) call. This doesn’t happens with other libraries, so I’m not sure if a Babel or a node-postgres bug.

[adieuadieu]

Another solution (if using webpack), is to add new webpack.IgnorePlugin(/^pg-native$/) to your webpack config’s plugins array. E.g.

const webpackConfig = {
  ...
  resolve: { ... },
  plugins: [
    new webpack.IgnorePlugin(/^pg-native$/)
  ],
  output: { ... },
  ...
}

[antonycms]

Nothing worked for me, so I created a manual fix myself

create a fix.js file at the root of the project:

const fs = require('fs');
const path = require('path');

const pgClientPath = path.resolve(__dirname, 'node_modules', 'pg', 'lib', 'native', 'client.js');

fs.readFile(pgClientPath, 'utf8', function(err, data) {
  if (err) {
    return console.log(err);
  }

  const result = data.replace("var Native = require('pg-native')", 'var Native = null');

  fs.writeFile(pgClientPath, result, 'utf8', function(err) {
    if (err) return console.log(err);
  });
});

to run the patch file whenever you update or install a new dependency, add it to the package.json file:

"scripts:": {
  "postinstall": "node fix.js"
}

---

If you are using sequelize, make the following configuration in the configuration part:

import * as pg from 'pg';  // import pg

const database = 'myDB';
const dialect = 'postgres';
const host = 'locahost';
const port = 5432;
const username = 'myUser';
const password = 'myPass';

export default {
  dialect,
  dialectModule: pg,
  username,
  password,
  database,
  host,
  port,

  define: {
    timestamps: true,
    underscored: true,
    underscoredAll: true,
  },
};